Boxes make your cat feel safe

A Dutch study found that cats given boxes upon entering into a shelter got used to their surroundings much more quickly than those that were deprived of fitting. Maru definitely proves that a cat is content in a box.

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Your cat doesn't want to deal with your nonsense

The Domestic Cat: The Biology of its Behaviour claims that "Cats do not appear to develop conflict resolution strategies to the extent that more gregarious species do, so they may attempt to circumvent antagonistic encounters by avoiding others or decreasing their activity."

In other words, our cats look at us or their dog roommates and literally can't even.